109results about "Sludge drying" patented technology

A drying apparatus, particularly suitable for disposing water-containing organic waste. The drying apparatus includes a drying chamber with a circular cross-section, where waste enters the drying chamber through a waste inlet and undergoes rotational movement within the drying chamber due to a negative pressure generated by an air pump. The air pump draws out airflow from the drying chamber through an air duct connected to the flow outlet, ensuring that the waste continues to rotate during the drying process. Additionally, the apparatus is equipped with a microwave generating device, which directs microwaves into the drying chamber either directly or via a microwave conduit to efficiently dry the waste. This design combines the cyclonic motion with microwave heating, significantly enhancing drying efficiency and ensuring that the waste is fully dried in a short time, making it particularly suitable for disposing organic residue that requires rapid drying.

Methods of biosolids processing disclosed herein may be configured in a two-stage process. The methods include the step of distributing biosolids in an input state onto a first thermal floor disposed within a first greenhouse, the first thermal floor adapted to transfer heat to the biosolids from a working fluid communicated through the first thermal floor thereby transforming the biosolids from the input state into a first processed state at a first stage of the two-stage process. The method includes the step of distributing the biosolids in the first processed state onto a second thermal floor disposed within a second greenhouse and then heating the biosolids thereby transforming the biosolids from the first processed state into a second processed state at a second stage of the two-stage process by heating the biosolids. Apparatus that functions to implement the methods are also disclosed.

The invention relates to the technical field of excrement air-drying equipment, and discloses novel excrement air-drying equipment which comprises a rack, multiple sets of excrement conveying plates opposite in running direction are arranged on the rack at intervals, a conveying mechanism is arranged at the outlet end of the excrement conveying plate located on the bottom layer, and the output end of the conveying mechanism communicates with a dry material lifting mechanism; an upper discharging channel and a lower discharging channel are arranged on the dry material lifting mechanism, the discharging channel located on the lower layer is communicated with a dry material laying mechanism, and the dry material laying mechanism is arranged above the manure conveying plate on the top layer; a wet material laying mechanism capable of swinging left and right is arranged on the portion, on one side of the dry material laying mechanism, of the rack. According to the dry manure spreading device, a layer of manure air-dried in the previous procedure can be spread on a manure board before wet manure is spread through cooperation of the conveying mechanism, the dry material lifting mechanism and the dry material spreading mechanism, then the wet manure is spread, the situation that the manure adheres to the manure board and blocks ventilation holes is effectively prevented, and the drying efficiency of the manure is improved.

A moisture content control method during an airflow drying process includes: comparing a reference moisture content of a product with a real-time moisture content of a material to obtain a first error, where the reference moisture content is a moisture content indicator of the product; obtaining a temperature fine-tuning value based on the first error; predicting a compensation temperature based on real-time detected intake and exhaust temperatures, and the real-time moisture content of the material, which is a theoretical exhaust temperature predicted in advance based on real-time operating conditions; adding the temperature fine-tuning value and the compensation temperature to obtain a reference temperature; adjusting a rotation speed of a feeding mechanism based the reference temperature to regulate the real-time moisture content; and repeating the above five steps. This moisture content control method can overcome the time lag in the airflow drying process and improve the accuracy of moisture content control. A control system for executing the moisture content control method is also provided.

The invention relates to the technical field of resource recycling, and discloses equipment for recovering precious metal from copper-containing sludge, the equipment comprises two side base plates, the two side base plates are symmetrically distributed, one side of each side base plate is fixedly provided with a side base frame, and a drying box is fixedly installed between the tops of the two side base frames; the top of each side base plate is slidably connected with two second mounting frames, supporting plates are fixedly mounted on one sides of the second mounting frames, and a drying groove is rotationally connected between the two supporting plates located at the opposite positions. A first mounting frame is fixedly mounted between the two second mounting frames located on the same side base plate. The two drying tanks are arranged to conduct drying in turn, the drying efficiency is improved, copper-containing sludge is stirred through the stirring wheel, it is ensured that the sludge is completely dried, each drying tank is composed of the two half tanks and is convenient to turn over and open, sludge blocks are discharged, meanwhile, the drying tanks are knocked by the connecting rods, and vibration cleaning of the drying tanks is achieved.

The invention discloses a material drying device and method. The material drying device comprises a rotary kiln, a drying sleeve and a propelling mechanism. The drying sleeve sleeves the outer side of the rotary kiln, one end of the drying sleeve is provided with a feed port, the other end of the drying sleeve is provided with a discharge port, and the drying sleeve is used for guiding materials needing to be dried and drying the materials through waste heat of the rotary kiln; the propelling mechanism comprises a spiral feeding blade, a spiral cleaning and scraping blade and a telescopic piece, the spiral feeding blade and the telescopic piece are fixedly arranged on the outer side of the rotary kiln and rotate along with the rotary kiln, and the spiral feeding blade is located on the inner side of the drying sleeve. According to the rotary kiln, the kiln body of the rotary kiln is sleeved with the drying sleeve, a channel for drying materials is formed, waste heat on the outer surface of the kiln body is used for drying, under the action of the spiral feeding blade and the spiral cleaning and scraping blade of the propelling mechanism, the materials are smoothly fed in the channel, the continuous drying and feeding process is achieved, and the drying efficiency is improved. And the materials can be continuously dried along with the continuous work of the rotary kiln.

The invention relates to a method for drying moist material (1), in particular in the form of sewage sludge, using a drying system, wherein the moist material (1) is fed via a feed line (2) of the drying system to a feed unit (3) of the drying system, fed by the feed unit (3) onto a drying surface (4) of the drying system, and dried there. According to the invention, it is proposed that during the feeding of the moist material (1) in the area of ​​the feed line (2) and / or the feed unit (3), a parameter dependent on the water content of the moist material (1) passing the sensor (5) is monitored, and that the quantity of moist material (1) fed per unit of time onto the drying surface (4) by the feed unit (3) is continuously regulated taking this parameter into account. Furthermore, a drying system for drying moist material is proposed.

An atomizing spray dryer employs one or more stages defined by ultrasonic transducers in close proximity to a liquid feed opening forming a path of an atomization flow for producing uniform droplets from a close tolerance with the transducer. The atomization flow exits a gap between the transducer and an outer edge of the opening, such that the passed liquid is responsive to an oscillation of the transducer for forming the droplets. A conical or other suitably shaped transducer engages a substantially round liquid feed opening. Subsequent stages may include a circular, ring, or other suitable shape aligned to receive the atomization flow from a circumference of the conical base, or may also take any suitable shape, preferably to receive droplets directed by the first stage.

The present invention relates to the technical field of resource recycling, and discloses a device for recovering precious metals from copper-containing sludge, including a side base plate, wherein the side base plate is provided with two symmetrically distributed ones, a side base frame is fixedly installed on one side of each of the side base plates, a drying box is fixedly installed between the tops of the two side base frames; two second mounting frames are slidably connected to the top of each of the side base plates, and a support plate is fixedly installed on one side of the second mounting frame, and a drying trough is rotatably connected between the two support plates at relative positions; a first mounting frame is fixedly installed between the two second mounting frames located on the same side base plate. The present invention improves the drying efficiency by setting two drying troughs to dry in turn, stirs the copper-containing sludge by a stirring wheel to ensure that the sludge is completely dried, and the drying trough is composed of two half troughs, which are convenient for flipping and opening to discharge the sludge blocks, and at the same time, a connecting rod knocks the drying trough to achieve vibration cleaning of the drying trough.

The invention relates to thallium-containing wastewater treatment equipment which comprises a treatment pond provided with a water outlet pipe, a circular material collecting disc is arranged at the bottom in the treatment pond, the top of the side wall of the material collecting disc is turned outwards to form a circle of bent part, the side wall of the bent part is of a net-shaped structure, a sealing plate is arranged at the top of the bent part, and a water outlet pipe is arranged at the bottom of the sealing plate. The sealing plate is connected with a convex block below the bent part through a mounting rod, a rack driven by a driving mechanism is arranged on the sealing plate, a cleaning mechanism located right above the interior of the opening of the material collecting disc is further arranged at the top of the treatment pond and comprises a cylinder driven by a motor I, a circle of groove is formed in the bottom of the cylinder in a surrounding mode, and the motor I is connected with the motor I; the side wall of the cylinder is provided with a drainage hole communicated with the interior of the groove, the two sides of the bottom of the cylinder are provided with a scraping plate and a collecting assembly respectively, the bottom of the material collecting disc is provided with a round hole used for the cylinder to penetrate through, and the round hole is sealed through a sealing mechanism. Sediments can be conveniently collected and are prevented from being discharged together with liquid to block the water outlet pipe.

The invention relates to an oil dryer and to a device for the mass and volume reduction of water- and carbon-containing waste materials with such an oil dryer and a fixed bed gasifier. Water- and carbon-containing waste materials, such as, for example, sewage sludge and food waste, are very heavy due to the high water content, and cannot be thermally recycled without prior drying. It is therefore desirable to reduce the mass and volume of these waste materials. As a result of the direct heating of the mixture of oil and waste materials in the drying container (2) by means of an integrated heat exchange device (15), it is not necessary to supply heated oil from an oil storage tank. It is therefore possible to control the temperature in the mixture of waste materials and oil more precisely in the drying container (2), which in turn significantly improves the drying of the water- and carbon-containing waste materials. Furthermore, the more accurate temperature control in the drying container (2) permits a targeted and effective heating of the moist waste materials with a high proportion of solids. The use of a direct heating device (15) in the drying container (2) therefore eliminates the difficulties and high expense otherwise associated with oil conveying and the controlling of the oil temperature.

Methods of biosolids processing disclosed herein include the step of distributing biosolids in an input state onto an outer circumference of a thermal floor disposed within a greenhouse, the thermal floor adapted to transfer heat to the biosolids and thereby transform the biosolids from the input state into a first processed state by heating the biosolids while spirally transferring the biosolids from the outer circumference to an inner circumference of the thermal floor. The method includes the step of distributing the biosolids in the first processed state onto a conveyance and then further heating the biosolids and thereby transforming the biosolids from the first processed state into a second processed state. Apparatus that functions to implement the methods are also disclosed.

A centrifugal pellet dryer system includes a centrifugal dryer, a blower to generate counter-current airflow across the centrifugal dryer, damper(s), moisture sensor(s), airflow sensor(s), processor(s), and a memory. The processor(s) continuously monitor (i) the airflow across the centrifugal dryer via the airflow sensor(s), (ii) the moisture level of the pellets via the moisture sensor(s), (iii) a blower motor load, and (iv) a centrifugal dryer motor load. The processor(s) determine whether the airflow falls below a predetermined threshold, and responsive to such determination, automatically initiate a water and / or air spray to reduce fines within the centrifugal dryer. The processor(s) continuously compare the moisture level of the pellets to predetermined threshold(s), and dynamically adjust the damper(s) and / or the blower motor load, thereby adjusting the moisture level of the pellets. The processor(s) continuously determine whether the slurry requires additional or less water, and automatically adjust water to the slurry based on such determination.

The present application relates to the technical field of sludge drying, and discloses a sludge low-temperature drying device, which comprises a pretreatment box and a drying box, a conveying mechanism, an air supply mechanism and a dehumidification mechanism are arranged in the drying box, the drying box comprises a feeding port and a discharging port, the conveying mechanism is used for conveying sludge at the feeding port end to the discharging port end, the conveying mechanism comprises a conveying belt, a first material guide and a second material guide, the conveying belt comprises a first conveying section and a second conveying section, the first conveying section is located below the feeding port, the first material guide is arranged on the first conveying section and is used for guiding sludge on the first conveying section to the second conveying section, and the second material guide is arranged on the second conveying section and is used for guiding sludge on the second conveying section to the discharging port. The present application is used for solving the problem that in the prior art, a plurality of conveying belts need to be arranged in the drying box so as to cooperate with the overturning mechanism to overturn the sludge, and the cost is high.

The invention relates to the technical field of drying, and discloses a scraper roller drying device and method. The drying roller is rotationally connected to the mounting frame and comprises a first side face and a second side face, and the first side face and the second side face are the surfaces on the two sides of the longitudinal symmetry face of the drying roller correspondingly. The first guniting pipe is installed on the installation frame, and a plurality of first guniting holes are formed in the side wall of the first guniting pipe and correspond to the first side face. The second guniting pipe is installed on the installation frame, and a plurality of second guniting holes are formed in the side wall of the second guniting pipe and correspond to the second side face. The scraping end of the scraper abuts against the second side face, and the first guniting pipe, the scraper and the second guniting pipe are sequentially arranged in the rolling direction of the drying roller. According to the scraper roller drying device and method, the drying efficiency is improved.

The present invention relates to a drying apparatus for evaporating volatile constituents from a starting material to be dried, to a process for producing an isocyanate using this drying apparatus and to the use of the drying apparatus for drying distillation bottoms streams, oil-containing waste, waste paint or coating materials, sewage sludges, mineral substances and coal slurries contaminated with organic compounds. In the drying apparatus the evaporated constituents (vapours) are passed into a condenser via a vapor dome and a vapor conduit. The drying apparatus has the feature that partial condensation of the vapours in the vapor dome and / or in the vapor conduit is intentionally allowed or induced during operation, and condensed constituents of the vapours are discharged from the drying apparatus via means installed for this purpose in the vapor dome and / or the vapour conduit.

(57) This invention relates to a method and an installation for treating waste sludge obtained after distillation of solvents contaminated with printing inks, which will find application in the wastewater treatment industry. The plant comprises a vacuum drying chamber (1) comprising a door (13 tightened by wing nuts (14) and a support frame (2) to which is fixed a heat exchange surface (4) on which trays (3) are fixedly arranged. The vacuum drying chamber (1) is functionally connected to both a heating module and a jacketed condenser (5). The heating module comprises an oil heater (9) which is composed of a tank with heaters mounted therein and an expansion tank (10). The jacketed condenser (5), composed of tubes (6) and an intertube space (7), is connected on one side to a refrigeration module (8) and on the other side to a vacuum module consisting of a vacuum pump (11) and a receiver (12).

A system for preparing fertiliser, comprising: a dry matter concentrator 10 (e.g., fluid bed drier) configured to receive manure, slurry, digestate and / or sludge F and to increase the dry matter content thereof; and a scrubber system 20 configured to receive off gases A from dry matter concentrator, with the scrubber system configured to create a scrubbing liquor B from the off gases, and to mix the liquor with the manure, slurry, digestate and / or sludge. The scrubber system may remove ammonia from off-gases, and / or receive a reagent for chemically binding ammonia into the scrubbing liquor. The system may comprise a pressurisation unit to increase scrubbing liquor pressure, and / or flow regulation device to regulate scrubbing liquor flow. Also disclosed is a method for preparing fertiliser, comprising: receiving offgases from the dry matter concentrator; creating scrubbing liquor from off gases; and mixing the scrubbing liquor with manure, slurry, digestate or sludge. The system and methods aim to increase the nutrient content of fertiliser products.

Method for the treatment of sewage sludge (2) which at the beginning of the process has a dry matter content in the range of 30 to 75 wt.%, comprising: a) Feeding the sewage sludge (2) into a pelletizing unit (3) with a motor-driven press (4), b) Pelletizing the sewage sludge (2) with the pelletizing device (3) to produce pellets (5), c) Transferring the pellets (5) obtained in step b) to a drying device (6), d) Drying the pellets (5) in the drying device (6) so that the pellets (5) have a dry matter content of at least 80 wt.% after drying.

The invention relates to an efficient synergistic sludge treatment device, and relates to the technical field of sludge treatment.The sludge treatment device comprises a sludge treatment line, and the sludge treatment line comprises a sludge feeding mechanism, a sludge dewatering mechanism, a relay conveying mechanism, a drying mechanism and a sludge discharging mechanism which are sequentially communicated; a heat medium supply mechanism; an air supply mechanism; the air preheating mechanism, the heating medium supply mechanism, the drying mechanism and the air preheating mechanism are sequentially communicated, and the heating medium supply mechanism is used for outputting a heating medium and enabling the heating medium to sequentially flow through the drying mechanism and the air preheating mechanism; the air supply mechanism, the air preheating mechanism and the drying mechanism are sequentially communicated, and the air supply mechanism is used for outputting air and enabling the air to sequentially flow through the air preheating mechanism and the drying mechanism; the air preheating mechanism is used for conducting heat exchange between a heating medium and air. And the tail gas purification mechanism communicates with the drying mechanism. The heat energy utilization rate in the sludge treatment process can be increased, and the operation energy consumption can be reduced.

A plant for treating organic material, having a reactor configured to dry organic material and a closure device (9) operating on a loading channel (6) for feeding material into the reactor. The closure device is designed to interact with material located at the outlet mouths (7) of the loading channel using separation elements (11). According to further aspects, the system may include an active filter (34) on a gas exhaust duct (30) that directs moisture-rich gases outside the reactor. In addition, the plant may be equipped with one or more suspension systems (57) that connect a frame (56) supporting the reactor to an angular position sensor (59), enabling translational movement of the sensor (59) relative to the frame. In other aspects, a process for treating organic material is provided, which involves loading the material into the reactor in a differentiated manner across two or more zones (3a) within the reactor (2).

Method and apparatus for carbonizing sludge with organic content, wherein a pre- dried sludge is processed and the material is moved in a closed space till carbonization, and the major part of water content thereof is removed mostly by heating until the solid content of the material has reached at least 85 v%, then the materiel is fed into the carbonizer reactor (16) being a rotated double-walled container, and the material is passed twice along the carbonizer reactor (16) in opposite directions at a temperature between 450°C and 600 °C in an oxygen free environment in the presence of nitrogen, wherein the generated biogases are lead out, and used in part for the heating of the reactor and in part for the drying, and the hot air generated in the carbonizer reactor is used for drying, and the bio coal obtained in the reactor is cooled and processed either as bio fertilizer or as a heating material.

Drying plant for biomass and / or sludge (material to be dried) comprising a drying hall (18) with a heated floor and a building envelope that converts at least partial solar radiation into heat energy, a feeding device (1, 2, 3, 4) for feeding the drying hall (18) with material to be dried, a distribution and transport device (5) for moving the material to be dried through the drying hall (18) and for distributing and circulating the material to be dried, characterized in that the roof surface of the building envelope comprises air chambers from a volume surrounded by a film, wherein the air chambers are formed from at least two different films, namely an outwardly facing film made of a translucent and tear-resistant material with UV (ultraviolet) stabilizers and an inwardly facing film made of a translucent and tear-resistant material with anti-dew additives as well as IR (infrared) additives,wherein the foils of the roof surface are arranged so that the air chambers form thermal insulation and direct solar heating is provided in the event of solar radiation and wherein the drying hall (18) is divided into two separate rooms arranged one above the other by a suspended ceiling, wherein the lower room is the actual drying room and the upper room serves to preheat intake air.

Disclosed is a slurry drying plant (1) comprising a slurry extruder (3) including a slurry inlet (2) and conveying means (4) arranged to convey the slurry through the slurry extruder (3) and force the slurry out of a plurality of exit openings (5) of the slurry extruder (3) to form a plurality of slurry strings (7), wherein the slurry strings (7) are forced out into a drying chamber (8) in which the plurality of slurry strings (7) is dried. The slurry drying plant (1) further comprises slurry heating means (6) comprising flow means for passing superheated steam past the slurry strings (7) in the drying chamber (8), and inlet pressure detection means (9) for detecting a slurry inlet pressure at the slurry inlet (2). The slurry drying plant (1) also comprises control means (17) arranged to control the conveying speed of the conveying means (4) in response to the slurry inlet pressure. Furthermore, a method for drying slurry and use of a slurry drying plant (1) is disclosed.

A process and a plant for treating organic material, having a reactor configured to dry organic material and a closure device (9) operating on a loading channel (6) for feeding material into the reactor. The closure device is designed to interact with material located at the outlet mouths (7) of the loading channel using separation elements (11). According to further aspects, the system may include an active filter (34) on a gas exhaust duct (30) that directs moisture-rich gases outside the reactor. In addition, the plant may be equipped with one or more suspension systems (57) that connect a frame (56) supporting the reactor to an angular position sensor (59), enabling translational movement of the sensor (59) relative to the frame. In other aspects, treating organic material is provided, which involves loading the material into the reactor in a differentiated manner across two or more zones (3a) within the reactor (2).

Disclosed is a continuous centrifugal dewatering device including an external case having an internal space, a feed supply pipe to which a slurry as a mixture of a solid and a liquid is supplied, a basket provided inside the external case, a plurality of holes formed in the basket, a pusher plate provided inside the basket and configured to discharge a slurry cake attached to an inner circumferential surface of the basket to the outside of the external case, a non-contact seal configured to prevent the first gas from flowing into a space between the external case and the basket, and a gas inlet to which a second gas, which flows in a reverse direction with respect to a flow direction of the first gas flowing to the space between the external case and the basket, is supplied.

A material drying plant using superheated steam includes a downwardly open chamber with an inlet for the material to be dried, an outlet for dried material to be dried, an inlet for superheated steam and an outlet for a vapour, a conveying system for introducing the material into the chamber, transporting the material in the chamber, during drying, and discharging the dried material from the chamber, a vapour compressor for compressing a first portion of the vapour recirculated from the chamber and a heat exchanger for transferring heat from the compressed first portion by condensing a volume flow of the compressed first portion supplied to the heat exchanger. A vapour atmosphere is formed in an upper region of the chamber, which vapour atmosphere floats on ambient air located in a lower region of the chamber, wherein a transition layer is formed between the upper region and the lower region.

The present application relates to a VOCs waste gas treatment system, and relates to the technical field of sewage treatment, which includes a waste gas combustion device, a negative pressure source, and a sealing cover for covering a biochemical pool containing sewage; the sealing cover is connected to an air inlet pipe, and the end of the air inlet pipe away from the sealing cover is connected to the air inlet end of the negative pressure source, and the air outlet end of the negative pressure source is connected to the air inlet end of the waste gas combustion device; the outer wall of the sealing cover is penetrated with air holes for external gas to flow into the sealing cover; the waste gas combustion device is used to burn VOCs. The negative pressure source can input the waste gas containing VOCs in the sealing cover into the waste gas combustion device, so that the waste gas combustion device can burn VOCs, thereby reducing the possibility of VOCs polluting the air environment.

The invention relates to copper-containing sludge treatment, in particular to copper-containing sludge flameless combustion treatment equipment and a continuous feeding method thereof. The copper-containing sludge flameless combustion treatment equipment comprises a smoldering furnace, the top of the smoldering furnace is provided with a continuous feeding mechanism, the continuous feeding mechanism comprises a mounting frame, a sludge storage hopper and a telescopic rotating unit, and the mounting frame is arranged at a feeding port in the top of the smoldering furnace; the sludge storage hopper is mounted in the middle section of the mounting frame, a feeding hole is formed in the top of the sludge storage hopper, and the lower end of the sludge storage hopper is opened and butted with the feeding hole; the telescopic rotating unit is mounted at the top of the mounting frame and penetrates through the sludge storage hopper to extend into the smoldering furnace, and the lower end of the telescopic rotating unit is sequentially connected with a distributing sealing cone and a rotary homogenizer; the material distribution sealing cone can seal the feeding hole when the telescopic rotating unit ascends, and simultaneously drives the sludge in the sludge storage hopper to ascend so as to prevent smoldering flue gas from leaking; when the telescopic rotating unit descends, the material distribution sealing cone can uniformly discharge materials, and the rotary material homogenizer can crush the materials and flatten the sludge at the feeding hole.